From 02a888b567df92904eb0783f4f19a3f744064159 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Fri, 5 Aug 2016 18:26:19 +0300 Subject: [PATCH] net/ethoc: don't mix virtual and physical addresses Addresses used in buffer descriptors and passed in platform data or device tree are physical. Addresses used by CPU to access packet data and registers are virtual. Don't mix these addresses and use virt_to_phys for translation. Signed-off-by: Max Filippov Acked-by: Joe Hershberger --- drivers/net/ethoc.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/net/ethoc.c b/drivers/net/ethoc.c index a5c4b4621d..198827f912 100644 --- a/drivers/net/ethoc.c +++ b/drivers/net/ethoc.c @@ -255,6 +255,7 @@ static int ethoc_init_ring(struct ethoc *priv) /* setup transmission buffers */ bd.stat = TX_BD_IRQ | TX_BD_CRC; + bd.addr = 0; for (i = 0; i < priv->num_tx; i++) { if (i == priv->num_tx - 1) @@ -266,11 +267,12 @@ static int ethoc_init_ring(struct ethoc *priv) bd.stat = RX_BD_EMPTY | RX_BD_IRQ; for (i = 0; i < priv->num_rx; i++) { - bd.addr = (u32)net_rx_packets[i]; + bd.addr = virt_to_phys(net_rx_packets[i]); if (i == priv->num_rx - 1) bd.stat |= RX_BD_WRAP; - flush_dcache_range(bd.addr, bd.addr + PKTSIZE_ALIGN); + flush_dcache_range((ulong)net_rx_packets[i], + (ulong)net_rx_packets[i] + PKTSIZE_ALIGN); ethoc_write_bd(priv, priv->num_tx + i, &bd); } @@ -351,10 +353,10 @@ static int ethoc_update_rx_stats(struct ethoc_bd *bd) static int ethoc_rx_common(struct ethoc *priv, uchar **packetp) { - u32 entry; struct ethoc_bd bd; + u32 i = priv->cur_rx % priv->num_rx; + u32 entry = priv->num_tx + i; - entry = priv->num_tx + (priv->cur_rx % priv->num_rx); ethoc_read_bd(priv, entry, &bd); if (bd.stat & RX_BD_EMPTY) return -EAGAIN; @@ -365,7 +367,7 @@ static int ethoc_rx_common(struct ethoc *priv, uchar **packetp) int size = bd.stat >> 16; size -= 4; /* strip the CRC */ - *packetp = (void *)bd.addr; + *packetp = net_rx_packets[i]; return size; } else { return 0; @@ -428,9 +430,9 @@ static int ethoc_send_common(struct ethoc *priv, void *packet, int length) bd.stat |= TX_BD_PAD; else bd.stat &= ~TX_BD_PAD; - bd.addr = (u32)packet; + bd.addr = virt_to_phys(packet); - flush_dcache_range(bd.addr, bd.addr + length); + flush_dcache_range((ulong)packet, (ulong)packet + length); bd.stat &= ~(TX_BD_STATS | TX_BD_LEN_MASK); bd.stat |= TX_BD_LEN(length); ethoc_write_bd(priv, entry, &bd); @@ -463,14 +465,15 @@ static int ethoc_send_common(struct ethoc *priv, void *packet, int length) static int ethoc_free_pkt_common(struct ethoc *priv) { - u32 entry; struct ethoc_bd bd; + u32 i = priv->cur_rx % priv->num_rx; + u32 entry = priv->num_tx + i; - entry = priv->num_tx + (priv->cur_rx % priv->num_rx); ethoc_read_bd(priv, entry, &bd); /* clear the buffer descriptor so it can be reused */ - flush_dcache_range(bd.addr, bd.addr + PKTSIZE_ALIGN); + flush_dcache_range((ulong)net_rx_packets[i], + (ulong)net_rx_packets[i] + PKTSIZE_ALIGN); bd.stat &= ~RX_BD_STATS; bd.stat |= RX_BD_EMPTY; ethoc_write_bd(priv, entry, &bd); -- 2.39.5